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Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of 

  • Al2O3 +HF +NaAlF4

  • Al2O3 + CaF2 +NaAlF4

  • Al2O3 +Na3AlF6 +CaF2

  • Al2O3 +KF +Na3AlF6

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